CVE-2026-64515

In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: fix MLE defragmentation If either reconf or EPCS multi-link element (MLE) is contained in a non-transmitted profile, the defragmentation routine is called with a pointer to the defragmented copy, but the original elements. This is incorrect for two reasons: - if the original defragmentation was needed, it will not find the correct data - if the original frame is at a higher address, the parsing will potentially overrun the heap data (though given the layout of the buffers, only into the new defragmentation buffer, and then it has to stop and fail once that's filled with copied data. Fix it by tracking the container along with the pointer and in doing so also unify the two almost identical defragmentation routines.

CVSS v3 8.3 HIGH

8.3^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.5

Attack Vector ADJACENT_NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact LOW

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/1f573e17bcb7275ddd1c8f47f46ae0faf0e902a4
https://git.kernel.org/stable/c/55c479aae99b120489a432db9c717484e523dfd6
https://git.kernel.org/stable/c/722b3f86df80644463d29fe5451e30a617f74500
https://git.kernel.org/stable/c/a74e893f30db64cdce0fc7a96d3baa417bcd55f5

Configurations

No configuration.

History

19 Oct 2026, 21:17

Type	Values Removed	Values Added
CWE		CWE-787

Information

Published : 2026-07-25 10:17

Updated : 2026-10-19 21:17

NVD link : CVE-2026-64515

Mitre link : CVE-2026-64515

CVE.ORG link : CVE-2026-64515

JSON object : View

Products Affected

No product.

CWE

CWE-787

Out-of-bounds Write

{"id": "CVE-2026-64515", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-64515", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-10-16T15:41:31.140856Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.3, "attackVector": "ADJACENT_NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.5, "exploitabilityScore": 2.8}]}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "4d70e9c5488dd57ff5fcabe4d4ecf3d9dd4555ff", "lessThan": "1f573e17bcb7275ddd1c8f47f46ae0faf0e902a4", "versionType": "git"}, {"status": "affected", "version": "4d70e9c5488dd57ff5fcabe4d4ecf3d9dd4555ff", "lessThan": "55c479aae99b120489a432db9c717484e523dfd6", "versionType": "git"}, {"status": "affected", "version": "4d70e9c5488dd57ff5fcabe4d4ecf3d9dd4555ff", "lessThan": "722b3f86df80644463d29fe5451e30a617f74500", "versionType": "git"}, {"status": "affected", "version": "4d70e9c5488dd57ff5fcabe4d4ecf3d9dd4555ff", "lessThan": "a74e893f30db64cdce0fc7a96d3baa417bcd55f5", "versionType": "git"}], "programFiles": ["net/mac80211/parse.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.9"}, {"status": "unaffected", "version": "0", "lessThan": "6.9", "versionType": "semver"}, {"status": "unaffected", "version": "6.12.92", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.34", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.0.11", "versionType": "semver", "lessThanOrEqual": "7.0.*"}, {"status": "unaffected", "version": "7.1", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["net/mac80211/parse.c"], "defaultStatus": "affected"}]}], "published": "2026-07-25T10:17:37.763", "references": [{"url": "https://git.kernel.org/stable/c/1f573e17bcb7275ddd1c8f47f46ae0faf0e902a4", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/55c479aae99b120489a432db9c717484e523dfd6", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/722b3f86df80644463d29fe5451e30a617f74500", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/a74e893f30db64cdce0fc7a96d3baa417bcd55f5", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Received", "weaknesses": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-787"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: fix MLE defragmentation\n\nIf either reconf or EPCS multi-link element (MLE) is contained in\na non-transmitted profile, the defragmentation routine is called\nwith a pointer to the defragmented copy, but the original elements.\n\nThis is incorrect for two reasons:\n - if the original defragmentation was needed, it will not find the\n correct data\n - if the original frame is at a higher address, the parsing will\n potentially overrun the heap data (though given the layout of\n the buffers, only into the new defragmentation buffer, and then\n it has to stop and fail once that's filled with copied data.\n\nFix it by tracking the container along with the pointer and in\ndoing so also unify the two almost identical defragmentation\nroutines."}], "lastModified": "2026-10-19T21:17:41.540", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}